package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.mapper.SetmealDishMapper;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    SetmealDishMapper setmealDishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    //新增菜品及口味
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO){
        //向菜品表插入一条数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.inser(dish);

        long dishId = dish.getId();


        //向口味表插入n条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() >0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.inserBatch(flavors);
        }
    }
    //菜品分页查询
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO){
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }
    //删除菜品
    @Transactional
    public void deleteBatch(List<Long> ids){
        //判断是否起售中
        for (Long id : ids){
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE){
                //处于起售中
                throw  new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断是否被套餐关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishId(ids);
        if(setmealIds != null && setmealIds.size() > 0){
            //被关联
            throw  new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表中数据
//        for (Long id : ids) {
//            dishMapper.deleteById(id);
//            //删除口味数据
//            dishFlavorMapper.deleteByDishId(id);
//        }
        dishMapper.deleteByIds(ids);
        dishFlavorMapper.deleteByDishIds(ids);
    }
    //根据id查菜品和口味
    public DishVO getByIdWithFlavor(Long id){
        //根据id查菜品数据
        Dish dish = dishMapper.getById(id);
        //根据id查菜品口味数据
        List<DishFlavor> dishFlavor = dishFlavorMapper.getByDishId(id);

        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavor);
        return dishVO;
    }
    //修改菜品信息和口味
    @Transactional
    public  void updateWithFlavor(DishDTO dishDTO){
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //修改菜品基本信息
        dishMapper.update(dish);
        //删除口味
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //重新插入口味
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() >0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.inserBatch(flavors);
        }
    }
    //根据分类查菜品
    public List<Dish> dishList(Dish dish){
        //根据id查菜品口味数据
        List<Dish> dishes = dishMapper.dishList(dish);


        return dishes;
    }
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.dishList(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
